节省PC输入输出点数的有效方法

Effective Methods Saving Input/output Points of PC

本文提出节省PC输入点的方法,包括二极管隔离法、二极管编码法及单行程开关多撞块结构;节省PC输出点的方法,包括状态输出点法及输出译码法等。最后举例说明该方法的使用效果。

In this paper, the methods saving input points of PC are presented, containing isulationwith diodes, coding with diodes and structure of single distance switch and multistage strike blocks.The methods saving output points of PC are presented. containing state output point and output de-coding method. Finally, practical effect of the methods is illustrated by means of an example.